Controllability, stabilizability, and matrix Riccati equations for periodic systems
H. Kano, Toshiya Nishimura · IEEE Transactions on Automatic Control · 1985
In this note, controllability, stabilizahility, and related concepts for periodically time-varying systems are discussed. Especially, it is proved that the definition of controllability employed in connection with the existence of periodic solutions of periodic matrix Riccati equations is equivalent to Kalman's original definition.